Sewing machine



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A. B. v--owLEr-e SEWING MACHINE Original Fild May 21, 191g 4 sheets-sheet 1 [7 we; 'Lian' 'dw/MKM.

March 2 ,1926. 1,575,1o

A. B. FOWLER SEWING MACHINE origin; Filed May 21, 1919 4 Sheets-Sheet 2 March 2 1926.

- A. B. FOWLER SEWING MACHINE original File@ may 21, 1919 4 Sheets-Sheet 5 March 2 1926.

A. B. FOWLER SEWING MACHINE Original Filed May 2l, 1919 4 Sheets-Sheet 4 ffm.

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Patented Mar. 2, 1926.

UNITED ASTATES TEN T OFF-ICE ALFRED B. FOXLER,` OF BEVERLY, MASSACHUSETTS,ASSKIGNOR TO`UNTED SHOE MACHINERY CORPORATION, OF PATERASONQNEW yJ]E}RSEY.-A CORPORATION OF NEW JERSEY.

SEWING MACHINE.

Original'application led'May 21, 1919, Serial No. 298,589. Divided and this application filed September 25, 1920,'seria1 No. 412,651.

T0 all who-m. t may concern:

ylle it known that I, ALFRED B. FowLER, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sewing Machines; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable -others skilled in the art to which it appertains to make and use the same.

The present'invention relates to sewing machines and more particularly to inseam shoe sewing machines.

The principal object of the invention 1s to provide mechanisms of novel and vimproved construction and mode of operation for actuating the thread linger and looper in this class`of sewing machines. To this end, the features of the invention consist in the constructions, arrangements and combinations `of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art.

The several features of the invention will be clearly understood from the following description and accompanying drawings, in which:

Figure 1 is a sectional elevation looking from the right and taken on' a plane just to the right of the needle segment of an inseam shoe sewing machine embodying the features in their preferred. form; Fig. 2 is a side elevation looking from the left with a portion of the casing removed; Fig. 3 is a plan view, partly in section, of a portion of the head of the machine; Figs. 4 to 7, inclusive, arediagrammatical views showing in plan the successive positions which the needle, thread finger and looperassume in the performance of their cycles of operations, a por tion of the sole and upper of a shoe being shown in section through the plane of the seam; Fig. 8 is a side elevation corresponds ing to Fig. 7 and showing the shoe in vertical section.

The machine illustrated in the drawings may be and preferably is the same as the machine illustrated and described in applicants co-pending application, Serial o. 298,589, filed May 21, 1919, of .which `the present application constitutes a division. This machine, as illustrated, is provided Renewed August 27, 1925.

with 'a curved'hooked'needle 2, a needle guide 4, a thread finger 6, a' looper 8 and a take-up mechanism 10.

The needle is secured in the usual manner vto a needle segment 12 which is pivotally mounted on a shaft 14 and is'actuated by a ylinlr16 having one end pivotally connected at 18 with theV needle'segment and its other end pivotallyconnected with a camactuated leverr20. I

Intheillustrated machine, the thread finger 6 moves 'in the direction of the line of feed outside of the line'of the seam and in an arc of a circle having a vertical axis or an axis perpendicular to aplane 'which is tangent to the path of the needle at the sewing point. The thread finger is secured to the lower end of a vertical shaft 22, on the upper end of which shaft is secured a gearf24- that meshes' with rack teeth formed on the forward end of a horizontal-ly sliding bar 26. The bar 26`is actuated to impartthe desired movement to the thread linger by means of` a roll on the rear end of the bar that engages a cam groove 28 in an oscillatin'glever 30 which is connected by a link 32 with the cam actuated lever 20.

The looper 8 is secured to the inner end of lever 34. vThelever 34 is actuated to move the looper in one direction by means of a slide 36 and is actuated `to move the looper in atransverse direction by 'means of a slide 38. The lever 34 is connected with the slide 36 through anarm 40 secured to a stud 42 pivotally mounted inthe frame, and said arm has lits free end pivotally connected with the' outer end of the lever 34. To thek pivoted stud is secured a gear segment 44,'the teeth of which are operatively engaged by rack teeth 46 formedon the slide 36. The slide 38 is connected with the lever 34 by means of a pin 48 secured to the forward end of the slide and extending through an elongated slot in the lever. The slide 36 is operatively connected with a cam actuated lever 50 by means of an adjustable link 52, and the slide 38 is operatively connected with a cam actuated lever 54 by means of an adjustable link 56.

The combined action of the devices for actuating the looper causes the looper to completely encircle the needle .in such a manner as to result in the formation of a chain til? 4 linger in the direction o1"- the line of feed and in a horizontal piane ensures such threading of the needle in a uni'l'or1nl57 reliable manner. n Figs. #t t0 7, inclusive, are illustrated 1ittici-ent relative positions assumed by the needle, looper and thread finger during the formation of a stitch. In Fig. 'a' these parts are shown just after the loopcr has made its Iirst movement across the plane of the needle and outside oit the circle ot the needle. In Fig. the thread is shown completely encircling the needle. In Fie'. G the parts are shown vjust before the needle pulls the loop through the previously :termed loop. Fig. 7 shows the needle at the limit o'tl its loop drawing' stroke, and also in this figure is indicated b v a broken line the path traversed b v the loopcr during` a cycle of operations.

The travel of both the thread iinger and looper in a horizontal plane or in a plane tangent to the path of the needle at the sewing point gives a maximum amount ot clearance at all times between these parts and thesole ot the shoe.

`While it is preferred to employ the specitic construction and arrangement ot parts illustrated and described, it is to be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departingtrom the broader features ot the invention.

The nature and scope oi" the present invention having' been indicated, and a machine embodying the several 'features or" the invention in their preferred form having` been specifically described, what is claimed is l. A chain stitch inseam shoe sewing` inachine having` in combination, a curved hook needle, a loopcr movable to lay the thread in the hook of the needle, a take-up, and a thread linger engaging the thread between the loopcr and the work mounted to have a loop drawing movement in the direction of feed outside ot the seam.

2. i chain stitch inseam shoe sewing machine having, in combination, a curved hook needle, a loopcr, a talle-up, and a thread linger engaging the thread between the loopcr and the work mounted to have a loop drawing' movement in a plane tangent to the circle of the needle at the sewing point.

E3. A chain stitch inseam shoe sewing machine having', in combination, a curved hook needle, a loopcr, a take-up, and a thread linger engaging the thread between the looper and the work mounted to have a loop drawing movement in the direction of feet about an axis parallel to the plane of the needle and perpendicular to a plane tangent to the circle ot' the needle at the sewing point.

il. i chain stitch inseam shoe sewing machine having, in combination, a curved hook needle, looper, a take-up, a thread linger engaging the thread between the looper and the work, and means for moving both the thread finger and the looper in a plane tangent to the circle of the needle at the se 'ine point.

n.. chain stitch inseam shoe sewing inachine having, in combination, a curved hook needle, a loopcr, a take-up, a thread linger engaging] the thread between the loopcr and the work, nie-ans for imparting` a loop drawing;- movement to the thread finger in the direction ot iieed, and means tor moving the looperabout the needle in a path passingr i'irst outside ot the circle of the needle and then inside of the circle ol the needle to produce a chain stitch, the loops ot' which are twisted through a coinijilete turn.

6. A chain stitch inseam shoe sewing machine having, in combination, a curved hook needle, a looper movable to lav the thread in the hooi: oi the needle, a take-up, and a thread linger engaging;v the thread between the looper and the work mounted to have a loop drawing' moven'ient in the direction ol feed.

ALFRED B. FGVLER 

